The “Farmers blimp” (which is no longer in service) was not a blimp at all; it was a zeppelin, built by the German firm that created the Hindenburg. And it was not owned or operated by Farmers Insurance. The real name of the airship was Eureka and it was owned and operated by a now-defunct company called Airship Ventures.
Unlike a blimp (which has no rigid framework and maintains its shape from the pressure of its internal gas, like a balloon), the Zeppelin NT is built around a framework of aluminum and high-strength carbon-fiber.
The learn more about the difference between a blimp and a zeppelin, visit Dirigibles, Zeppelins, and Blimps.